[kobuskint]

I have used a car cd/radio and spare (non-car) speakers to supply decent sound to a garage and to outside speakers. I used a car radio because I had a spare one and to get four speakers all going at a decent rate (4x50W). The power supply is a 10A 12V unit that I refurbished.

The sound is great from the CD but I cannot get any radio reception.

I cannot guarentee that my radio has not got a tuner problem, but using a new car radio antenna and a single core wire, I can get hiss, but no reception of any kind on either FM, MW or LW. If it was mute I would say the tuner was broken, but I get hiss and if I take the antenna out, this hiss stops.

I have considered poor earthing but do not know how to check or earth the head unit.

I have the switched and permenant live wired together (red and yellow), and there is a neutral (black) to the power supply. Apart from eight speaker wires there are two blue amp wires (not used and isolated) and a single blue wire (not sure what this is) that is isolated and not connected to anything.

Has anyone any thoughts or ideas, before I buy another stereo? It seems a shame because the systems works well apart from no radio signal.

Thanks for your help.

KK